Time-Travel Capsules with Public Time-Travel System
"The travellers have been cleared for time distension, length of stay, and insertion into a specified local time field and are costumed for their roles. The private capsules in the foreground contrast with the crowd at right entering the public utility field of the transport system."

Art and text from Sentinel by Syd Mead (Dragon's Dream, 1979)
The Syd Mead Project